diff options
| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-01-19 09:26:31 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-06-28 15:55:56 -0300 |
| commit | c32c868ab8b2b95724550d0130782c0767fc3bab (patch) | |
| tree | 53b43a7f006fe8f549affb6b6d4d24b808a75465 /sysdeps/unix/sysv/linux/sparc | |
| parent | dd45734e322a03287d34d8af9b7da7b35cfddb8e (diff) | |
| download | glibc-c32c868ab8b2b95724550d0130782c0767fc3bab.tar.gz glibc-c32c868ab8b2b95724550d0130782c0767fc3bab.tar.xz glibc-c32c868ab8b2b95724550d0130782c0767fc3bab.zip | |
posix: Add _Fork [BZ #4737]
Austin Group issue 62 [1] dropped the async-signal-safe requirement for fork and provided a async-signal-safe _Fork replacement that does not run the atfork handlers. It will be included in the next POSIX standard. It allow to close a long standing issue to make fork AS-safe (BZ#4737). As indicated on the bug, besides the internal lock for the atfork handlers itself; there is no guarantee that the handlers itself will not introduce more AS-safe issues. The idea is synchronize fork with the required internal locks to allow children in multithread processes to use mostly of standard function (even though POSIX states only AS-safe function should be used). On signal handles, _Fork should be used intead and only AS-safe functions should be used. For testing, the new tst-_Fork only check basic usage. I also added a new tst-mallocfork3 which uses the same strategy to check for deadlock of tst-mallocfork2 but using threads instead of subprocesses (and it does deadlock if it replaces _Fork with fork). [1] https://austingroupbugs.net/view.php?id=62
Diffstat (limited to 'sysdeps/unix/sysv/linux/sparc')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist | 1 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist index 5e0eed47e3..ee2aa17bca 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist @@ -2412,6 +2412,7 @@ GLIBC_2.33 mknod F GLIBC_2.33 mknodat F GLIBC_2.33 stat F GLIBC_2.33 stat64 F +GLIBC_2.34 _Fork F GLIBC_2.34 ___adjtimex64 F GLIBC_2.34 __adjtime64 F GLIBC_2.34 __aio_suspend_time64 F diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist index 99e6181e24..8a0cd15b42 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist @@ -2329,6 +2329,7 @@ GLIBC_2.33 mknod F GLIBC_2.33 mknodat F GLIBC_2.33 stat F GLIBC_2.33 stat64 F +GLIBC_2.34 _Fork F GLIBC_2.34 __libc_start_main F GLIBC_2.34 __mq_open_2 F GLIBC_2.34 __pthread_cleanup_routine F |